Environmental Material Division, National Environmental Engineering Research Institute (NEERI-CSIR), Nehru Marg, Nagpur, India.
J Hazard Mater. 2011 Feb 15;186(1):796-804. doi: 10.1016/j.jhazmat.2010.11.072. Epub 2010 Nov 25.
Cu-Mn based mixed oxide type low-cost catalysts have been prepared in supported form using mesoporous Al(2)O(3), TiO(2) and ZrO(2) supports. These supports have been prepared by templating method using a natural biopolymer, chitosan. The synthesized catalysts have been characterized by XRD, BET-SA, SEM, O(2)-TPD and TG investigations. The catalytic activity for CO as well as PM oxidation was studied, in a view of their possible applications in the control of emissions from solid fuel combustion of rural cook-stoves. The trend observed for the catalytic activity of the synthesized catalysts for CO oxidation was ZrO(2)>TiO(2)>Al(2)O(3) while for PM oxidation it was observed to be TiO(2)>ZrO(2)>Al(2)O(3). The effect of CO(2), SO(2) and H(2)O on CO oxidation activity was also investigated, and despite partial deactivation, the catalysts show good CO oxidation activity. An effective regeneration treatment was attempted by heating the partially deactivated catalysts in presence of oxygen. Redox properties of TiO(2) and ZrO(2) and their structure appeared to be responsible for their promotional activity for CO and PM oxidation reactions. These unordered mesoporous materials could be useful for such reactions where mass transfer is more important than shape and size selectivity.
采用模板法，以天然生物聚合物壳聚糖为模板，制备了负载型铜锰基混合氧化物型低成本催化剂，载体分别为介孔 Al(2)O(3)、TiO(2)和 ZrO(2)。采用 XRD、BET-SA、SEM、O(2)-TPD 和 TG 等手段对合成的催化剂进行了表征。研究了催化剂对 CO 和 PM 的氧化活性，以期将其应用于控制农村炉灶固体燃料燃烧排放。对于 CO 氧化，合成催化剂的催化活性趋势为 ZrO(2)>TiO(2)>Al(2)O(3)，而对于 PM 氧化，其活性趋势为 TiO(2)>ZrO(2)>Al(2)O(3)。还考察了 CO(2)、SO(2)和 H(2)O 对 CO 氧化活性的影响，尽管存在部分失活，但催化剂仍表现出良好的 CO 氧化活性。通过在氧气存在下加热部分失活的催化剂，尝试进行了有效的再生处理。TiO(2)和 ZrO(2)的氧化还原性质及其结构似乎是其促进 CO 和 PM 氧化反应活性的原因。这些无序介孔材料可能对质量传递比形状和尺寸选择性更为重要的反应有用。
